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Fujinon . T 600mm f/5.6
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PostPosted: Sat Apr 12, 2014 5:54 am    Post subject: Reply with quote
ForenSeil wrote:
@Ian
Processing lenses can be very nice "telescopes" but as far as I know many don't work nice at infinity in terms of resolution. For example my G-Claron was afwul at infinity and NEX-3.
Your Wollensak is above average for processing lenses I guess.


I think there must have been something wrong with your G-Claron as I have a dozen or more repro lenses and they all shoot fine at infinity. I have 9/150 and 9/210 G-Glarons and they are both very sharp at infinity, with the caveat that my Rodenstock APO-Gerogon 9/150 is slightly better.

Anyways, these lenses are often cheap enough to be worth a gamble.

This was with my Rodenstock Magnagon 5.6/75 which is also optimised for 1:1 like the G-Claron and APO-Gerogon, no lack of sharpness here, wide open:




This was with the APO-Gerogon 9/150 wide open:




PostPosted: Sat Apr 12, 2014 7:15 am    Post subject: Reply with quote
Is purple fringing only produced when shooting digital? I've noticed that many telephoto type longer lenses suffer from it, whilst the simpler (and physically longer) lenses don't. I think this is the same point as made above about doublets.

BTW, I've just won a Tokina made 600/8 monster... I guess we'll soon find out!

BTW 2 Good work with the repro lenses! Think I'd prefer something simpler though Smile


PostPosted: Sat Apr 12, 2014 8:37 am    Post subject: Reply with quote
Purple fringing happens with film too, was noticed less because people were having small prints made and weren't able to examine the negatives in the detail we do today with pixel peeping.


PostPosted: Sat Apr 12, 2014 9:09 am    Post subject: Reply with quote
That makes sense, thanks Ian.
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